1 Ducaton `Zilveren rijder` Piedfort at double weight

The ducaton known as the "zilveren rijder" was introduced by the States of Utrecht in 1659 after years of inter-provincial disputes over coinage standards. Piedforts — struck at double the planchet thickness from the same working dies as circulation issues — were produced not for commerce but as presentation pieces, gifts to dignitaries, or die trials retained by the mint master as official records of authorized types. Utrecht's mint, one of the smaller provincial operations in the Dutch Republic, used these heavy strikes to document compliance with the coinage ordinances issued by the States General.

The date range spanning 1659–1672 encompasses the rampjaar — the catastrophic French invasion year — when normal minting operations across the Republic were severely disrupted.